russetyoudaoicibaDictYouDict[russet 词源字典]
russet: [13] Latin russus ‘red’ went back ultimately to the prehistoric Indo-European *reudh- ‘red’, which also produced English red. From it was descended Old French rous, whose modern form roux has given English roux ‘flour and butter mixture’ [19] (it is short for beurre roux ‘browned butter’). This formed the basis of a diminutive form rousset, which passed into English via Anglo-Norman russet. The application of the word to a red-skinned variety of apple dates from the 18th century.
=> red, roux[russet etymology, russet origin, 英语词源]
russet (n.)youdaoicibaDictYouDict
mid-13c., "cloth of reddish-brown color," also (early 15c.) the color of this, from Old French rousset, from rosset (adj.) "reddish," diminutive of ros, rous "red," from Latin russus, which is related to ruber "red," from PIE *reudh- "red" (see red (adj.1)). As an adjective from late 14c. The word was applied to a type of apples first in 1620s, to a type of pears 1725.